fix: Don't backfill sentry.browser.* attributes

[loewenheim]

Description

We'll need to figure out exactly what we need in the product before we do this.

PR Checklist

• I have run yarn test and verified that the tests pass.
• I have run yarn generate to generate and format code and docs.

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

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New Features ✨

• (attributes) Add device.low_power_mode attribute for iOS by itaybre in #314
• Add db.redis.key by sentrivana in #326
• Add process.command_args by sentrivana in #327

Bug Fixes 🐛

• Don't backfill sentry.browser.* attributes by loewenheim in #339

• Backfill several deprecated attributes by loewenheim in #332

Internal Changes 🔧

• (attributes) Mark deprecated gen_ai and ai attributes as backfill by vgrozdanic in #333
• (deps) Bump astro from 6.0.2 to 6.1.6 in /docs by dependabot in #330

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